How to list variables declared in script in bash?

Question

In my script in bash, there are lot of variables, and I have to make something to save them to file. My question is how to list all variables declared in my script and get l

Answer 1

If you can post-process, (as already mentioned) you might just place a set call at the beginning and end of your script (each to a different file) and do a diff on the two files. Realize that this will still contain some noise.

You can also do this programatically. To limit the output to just your current scope, you would have to implement a wrapper to variable creation. For example

store() {
    export ${1}="${*:2}"
    [[ ${STORED} =~ "(^| )${1}($| )" ]] || STORED="${STORED} ${1}"
}

store VAR1 abc
store VAR2 bcd
store VAR3 cde

for i in ${STORED}; do
    echo "${i}=${!i}"
done

Which yields

VAR1=abc
VAR2=bcd
VAR3=cde